Process for producing cementitious products.



SAMUEL W. RAMSEY, OF KENT; OHIO.

PROCESS PRODUCING CEHENTITIOUS IRODUGTS.

No Drawing.

To all whom it may concern.

Be it known that I, SAMUEL W. RAMSEY, a citizen of the United States ofAmerica, residing at- Kent, in the county of Portage and State of Ohio,have invented certain new and useful Improvements in Processes forProducing Cementitious Products; and I hereby declare the following tobe a full, clear, and exact description ofthe invention, such as willenable others skilled in the art to which it pertains to make and usethe same.

This invention relates to a new process "for producing cementitiousproducts.

The object, of my invention is to'provide a new process for producing acementitious product such as brick, tile, artificial stone,

sewer-pipe and the like, which canbe cheaply operated and which Willproduce a product .that will be impervious to the action of water, ableto stand climatic changes and capable of'resist-ing severe crushingstrain.

My invention, therefore, consists of the process described in thespecification and particularly set forth in the claims.

In carrying out In invention I employ the ingredients, and 1n theproportions by volume, as follows: i

The blast furnace slag-is first ground to a suitable fineness and thebicarbonate of soda, the lime, the oxid of iron, the alum and the silicasand are then added to the ground slag and all the ingredients arethoroughly mixed and commingled by agitation and the composition is thenplaced in a suitable -mold or molds, according as the product which isto be formed is brick, tile or pipe. After the composition has beengiven the desired form or configuration the composition is removed fromthe mold and placed in a closed chamber or receptacle to which steam isadmitted and maintained therein at a pressure of about one hundred andfifty pounds to the square inch. The composition is subjected to theaction of the steam at this pressure for about five hours during whichtime the steam will thoroughly Specification of, Letters'ratent.Patented Aug, 27,1912. Application and February-18, 1911. Serial No.609,385.

vert in into a salt which is not injurious to the composition. Theproduct is then removed from the steam chamber and allowed'to cool. a

Brick, tile, artificial stone, sewer pipe andthe like formed accordingto my process will be very compact and will withstand a crushing strainof from six to eight thousand pounds to the square inch. The prodnotformed will not disintegrate under the action of the weather and isunaffected by climatic changes.

What I claim is,--

1. The herein described process of producing a cementitious productconsisting in mixing together a predetermined quantity of ground blastfurnace slag, bicarbonate of soda,lime, oxid of iron andchrome alum,agitating the mixture until all the ingredi ents are thoroughly.commingled, then placing the composition in a closed chamber unbedprocess of pro- 3. The herein described process of producin acementitious product consisting in mixing to ether a predeterminedquantity of ground blast furnace slag, bicarbonate of soda, lime, oxidof iron and chrome alum, agitating the mixture until all the ingredientsare thoroughly commingled, then placing the composition in a closedchamber' and subjecting the same to a steam pressure of one hundred andfifty pounds tothe square inch for five hours.

4. The herein described process of producing a cementitious productconsisting in mixing together a predetermined quantity of ground blastfurnace slag, bicarbonate of soda, lime, oxid of iron, chrome alum andsilica sand, agitating the mixture until all the ingredientsarethoroughly commingled, then placing the composition in a closedmixing together ninety parts of ground blast furnace slag, two partsbicarboate of soda,

five parts lime, one part oxid of iron, one.

part chrome alum and one part silica sand, then agitating the mixtureuntil all -the ingredients are thoroughly commingled and then placingthe composition in a closed chamber under steam pressure until the steamhas penetrated the composition.

6. The herein described process of producing a cementitions productconsisting in mixing together ninety parts of ground blast furnace slag,two parts bicarbonate of soda, five parts lime, one part oxid' of men,

one part chrome alum and one partsilica 2Q sand, then agitating themixture until all the ingredients are thoroughly commingled and thenplacing the composition in a closed chamber and subjecting the same to asteam pressure of one hundred and fifty pounds 25 W., B. smm, H. C.FRESHWATER.

